Respective effects of phlebotomy losses and erythropoietin treatment on the need for blood transfusion in very premature infants

Table 4 Comparison of the volumes of phlebotomy losses in preterm infants published in the literature

References	Year of publication	Population studied	Number of infants	Estimated losses (ml/kg/d)
[5]	1993	27-33 wks	24	0.6
[2]	1993	< 33 wks	51	0.4
[3]	1994	750 - 1500 g	241	0.7
[36]	1997	≤ 1500 g	47	3.3
[25]	1999	≤ 32 wks	100	0.6
[26]	2000	< 32 SA and < 1250g	114	0.9
[12]	2001	< 1000 g	172	1.8
[12]	2001	1000–1250 g		0.8
[13]	2002	< 1000 g	219	0.7
[37]	2005	500 - 1000 g	93	5
[27]	2006	450 - 800 g	40	0.6
[24]	2006	< 30 wks or > 1500 g	50	2
[28]	2008	1000 - 1750 g and 28–34 wks	40	0.8
[29]	2011	≤ 1250 g and < 30 wks	30	0.4
[6]	2013	500 – 1250 g	99	0.8
Present study		<32 weeks and < 1500 g	47	0.5

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